001/*
002 *  Copyright 2017 Anyware Services
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package org.ametys.plugins.externaldata.cache;
017
018import javax.jcr.RepositoryException;
019import javax.jcr.Session;
020
021import org.apache.avalon.framework.service.ServiceException;
022import org.apache.avalon.framework.service.ServiceManager;
023
024import org.ametys.core.observation.Event;
025import org.ametys.plugins.repository.AmetysObjectIterable;
026import org.ametys.web.cache.FOCommHelper;
027import org.ametys.web.cache.pageelement.PageElementCache;
028import org.ametys.web.repository.site.Site;
029import org.ametys.web.repository.site.SiteManager;
030import org.ametys.web.synchronization.AbstractSynchronizeObserver;
031
032/**
033 * Invalidate the site cache and page element cache when
034 */
035public class InvalidateCacheOnQueryChangesObserver extends AbstractSynchronizeObserver
036{
037    private PageElementCache _inputDataCache;
038    private PageElementCache _zoneItemCache;
039    private SiteManager _siteManager;
040    private FOCommHelper _foCommHelper;
041    
042    @Override
043    public void service(ServiceManager manager) throws ServiceException
044    {
045        super.service(manager);
046        
047        _inputDataCache = (PageElementCache) manager.lookup(PageElementCache.ROLE + "/inputData");
048        _zoneItemCache = (PageElementCache) manager.lookup(PageElementCache.ROLE + "/zoneItem");
049        _siteManager = (SiteManager) manager.lookup(SiteManager.ROLE);
050        _foCommHelper = (FOCommHelper) manager.lookup(FOCommHelper.ROLE);
051    }
052
053    public boolean supports(Event event)
054    {
055        return event.getId().equals(ObservationConstants.EVENT_QUERY_UPDATED)
056            || event.getId().equals(ObservationConstants.EVENT_QUERY_DELETED);
057    }
058
059    @Override
060    protected void _internalObserve(Event event, Session liveSession) throws RepositoryException
061    {
062        if (getLogger().isInfoEnabled())
063        {
064            getLogger().info("Database changes: " + event + ", invalidating cache");
065        }
066        
067        // clear the whole FO cache
068        AmetysObjectIterable<Site> sites = _siteManager.getSites();
069        for (Site site : sites)
070        {
071            try
072            {
073                _foCommHelper.invalidateFOCache(site);
074            }
075            catch (Exception e)
076            {
077                getLogger().error("Unable to clear cache of site " + site.getName(), e);
078            }
079        }
080        
081        // clear the page element cache
082        _inputDataCache.clear();
083        _zoneItemCache.clear();
084    }
085
086}